Getting Started Internationalizing (i18n) with Intlayer and TanStack Start (React)

import { t, type Dictionary } from "intlayer";import type { ReactNode } from "react";const appContent = {  key: "app",  content: {    viteLogo: t({ en: "Vite logo", fr: "Logo Vite", es: "Logo Vite" }),    reactLogo: t({ en: "React logo", fr: "Logo React", es: "Logo React" }),    title: t({      en: "TanStack Start + React",      fr: "TanStack Start + React",      es: "TanStack Start + React",    }),    count: t({ en: "count is ", fr: "le compte est ", es: "el recuento es " }),    edit: t<ReactNode>({      en: (        <>          Edit <code>src/routes/index.tsx</code> and save to test HMR        </>      ),      fr: (        <>          Éditez <code>src/routes/index.tsx</code> et enregistrez pour tester          HMR        </>      ),      es: (        <>          Edita <code>src/routes/index.tsx</code> y guarda para probar HMR        </>      ),    }),    readTheDocs: t({      en: "Click the logos to learn more",      fr: "Cliquez sur les logos pour en savoir plus",      es: "Haz clic en los logotipos para saber más",    }),  },} satisfies Dictionary;export default appContent;

import {  Outlet,  createRootRoute,  Link as RouterLink,} from "@tanstack/react-router";import { IntlayerProvider, useIntlayer } from "react-intlayer";function AppShell() {  // Example of using a dictionary at the top level:  const content = useIntlayer("app");  return (    <div>      <nav className="flex gap-3 p-3">        <RouterLink to="/">Home</RouterLink>        <RouterLink to="/about">About</RouterLink>      </nav>      <main className="p-6">        <h1>{content.title}</h1>        <Outlet />      </main>    </div>  );}export const Route = createRootRoute({  component: () => (    <IntlayerProvider>      <AppShell />    </IntlayerProvider>  ),});

import { createFileRoute } from "@tanstack/react-router";import { useIntlayer } from "react-intlayer";import reactLogo from "../assets/react.svg";export const Route = createFileRoute("/")({  component: () => {    const content = useIntlayer("app");    return (      <>        <button>{content.count}0</button>        <p>{content.edit}</p>        <img          src={reactLogo}          alt={content.reactLogo.value}          width={48}          height={48}        />        <p className="opacity-70">{content.readTheDocs}</p>      </>    );  },});

import { Locales } from "intlayer";import { useLocale } from "react-intlayer";export function LocaleSwitcher() {  const { setLocale } = useLocale();  return (    <div className="flex gap-2">      <button onClick={() => setLocale(Locales.ENGLISH)}>English</button>      <button onClick={() => setLocale(Locales.FRENCH)}>Français</button>      <button onClick={() => setLocale(Locales.SPANISH)}>Español</button>    </div>  );}

import { useRouter } from "@tanstack/react-router";import { Locales, getLocalizedUrl } from "intlayer";import { useLocale } from "react-intlayer";export function LocaleSwitcherNavigate() {  const router = useRouter();  const { locale, setLocale } = useLocale();  const change = async (next: Locales) => {    if (next === locale) return;    const nextPath = getLocalizedUrl(      window.location.pathname + window.location.search,      next    );    await router.navigate({ to: nextPath }); // preserves history    setLocale(next);  };  return (    <div className="flex gap-2">      <button onClick={() => change(Locales.ENGLISH)}>English</button>      <button onClick={() => change(Locales.FRENCH)}>Français</button>      <button onClick={() => change(Locales.SPANISH)}>Español</button>    </div>  );}

import { HeadContent, Scripts, createRootRoute } from "@tanstack/react-router";import { TanStackRouterDevtools } from "@tanstack/react-router-devtools";import Header from "../components/Header";import { IntlayerProvider } from "react-intlayer";import appCss from "../styles.css?url";export const Route = createRootRoute({  head: () => ({    meta: [      {        charSet: "utf-8",      },      {        name: "viewport",        content: "width=device-width, initial-scale=1",      },      {        title: "TanStack Start Starter",      },    ],    links: [      {        rel: "stylesheet",        href: appCss,      },    ],  }),  shellComponent: RootDocument,});function RootDocument({ children }: { children: React.ReactNode }) {  return (    <IntlayerProvider>      <html lang="en">        <head>          <HeadContent />        </head>        <body>          <Header />          {children}          <TanStackRouterDevtools />          <Scripts />        </body>      </html>    </IntlayerProvider>  );}

import { useEffect } from "react";import { useLocale } from "react-intlayer";import { getHTMLTextDir } from "intlayer";export const useI18nHTMLAttributes = () => {  const { locale } = useLocale();  useEffect(() => {    document.documentElement.lang = locale;    document.documentElement.dir = getHTMLTextDir(locale);  }, [locale]);};

import { getLocalizedUrl } from "intlayer";import {  forwardRef,  type AnchorHTMLAttributes,  type DetailedHTMLProps,} from "react";import { useLocale } from "react-intlayer";export interface LinkProps  extends DetailedHTMLProps<    AnchorHTMLAttributes<HTMLAnchorElement>,    HTMLAnchorElement  > {}const isExternal = (href?: string) => /^https?:\/\//.test(href ?? "");export const Link = forwardRef<HTMLAnchorElement, LinkProps>(  ({ href, children, ...props }, ref) => {    const { locale } = useLocale();    const hrefI18n =      href && !isExternal(href) ? getLocalizedUrl(href, locale) : href;    return (      <a href={hrefI18n} ref={ref} {...props}>        {children}      </a>    );  });Link.displayName = "Link";